Leaf cross section

Question 1

stomata is

Answer 1

where the carbon dioxide diffuses into the leaf from and its on the bottom of the leaf

Question 2

spongey mesophyll in the

Answer 2

middle of the leaf and contains lots of space

Question 3

palisade mesophyll

Answer 3

is where most of the photosynthesis happens so palisade cells contain many chloroplasts and have lots of chlorophyll

Question 4

upper epidermis

Answer 4

almost transparent to allow light to enter through

Question 5

phloem

Answer 5

phloem carry the glucose through the plant in tubes

Question 6

xylem

Answer 6

xylem carry water through the plant in tubes

Question 7

What controls the water loss in a plant

Answer 7

Guard cells

Question 8

What’s the movement of water THROUGH a plant

Answer 8

transpiration stream

Question 9

cross section drawing from top to bottom should look like

Answer 9

Epidermal tissue/cells at top
Palisade (mesophyll) tissue under them , bigger than the epidemal cells
Spongy (mesophyll) tissue - quadrilateral like circles
Air spaces
Stomata - Gaps
Guard cell - bottom of leaf

Question 10

how are phloem and xylems arranged

Answer 10

xylem inside the phloem

Question 11

how are xylem adapted

Answer 11

Made of dead cells
With no cytoplasm
Cells have no end wall
So form a continuous tube (for water to flow through)
Strengthened with lignin to provide support
Which prevents the xylem from bursting/collapsing
they also have no nucleus , cytoplasm , cell wall or chloroplasts

Question 12

how are Phloem adapted

Answer 12

Phloem is composed of tubes of elongated cells. Cell sap can move from one phloem cell to the next through pores in the end walls.